What are the standard MS Round Pipe sizes in MM?


When it comes to construction and plumbing projects, it’s essential to have a good understanding of the standard MS (Mild Steel) round pipe sizes in MM. These sizes play a crucial role in determining the suitability and compatibility of pipes for different applications. In this comprehensive guide, we will explore the various standard MS Round Pipe sizes in MM, providing you with the knowledge you need to make informed decisions for your projects.

Understanding MS Round Pipes

MS round pipes, also known as mild steel round pipes, are widely used in construction, infrastructure development, and plumbing systems. These pipes are known for their strength, durability, and versatility. The standard sizes of MS round pipes are defined by the Indian Standard (IS) code, which ensures uniformity and compatibility across different applications.

Common Standard MS Round Pipe Sizes in MM

Let’s dive into the most commonly used standard MS round pipe sizes in MM:

1. 15 MM

The 15 MM MS round pipe size is one of the smaller options available. It is often used in low-pressure applications such as residential plumbing for water supply lines.

2. 20 MM

The 20 MM MS round pipe size is slightly larger than the 15 MM variant. It finds application in residential plumbing, irrigation systems, and small-scale infrastructure projects.

3. 25 MM

With a diameter of 25 MM, this MS round pipe size offers increased flow capacity and is commonly used in medium-sized plumbing systems and infrastructure projects.

4. 32 MM

The 32 MM MS round pipe size is suitable for larger plumbing systems, sewage lines, and industrial applications that require higher flow rates.

5. 40 MM

At 40 MM, the MS round pipe size can handle substantial volumes of fluid. It is commonly used in industrial applications, large-scale infrastructure projects, and underground drainage systems.

6. 50 MM

The 50 MM MS round pipe size is often utilized in applications that require a higher flow rate, such as industrial processes, water treatment plants, and large-scale plumbing systems.

7. 65 MM

With a diameter of 65 MM, this MS round pipe size is suitable for heavy-duty applications, including oil and gas pipelines, industrial piping systems, and underground utilities.

8. 80 MM

The 80 MM MS round pipe size is commonly used in large-scale infrastructure projects, sewage systems, and industrial applications that require high flow rates and durability.

9. 100 MM

With a diameter of 100 MM, this MS round pipe size is suitable for major infrastructure projects, water supply networks, and other applications that demand substantial flow capacity.

10. 125 MM

The 125 MM MS round pipe size is utilized in large-scale water distribution systems, industrial applications, and underground utilities that require efficient fluid transportation.

The Importance of Standard MS Round Pipe Sizes

Having standardized MS round pipe sizes in MM is essential for various reasons. Firstly, it promotes uniformity and compatibility across different projects and applications. Contractors, engineers, and plumbers can rely on these standardized sizes to ensure that the pipes they choose will fit seamlessly with other components of the system. This reduces the risk of leaks, malfunctions, and costly repairs.

Secondly, standardized sizes facilitate efficient material planning and procurement. When the sizes are consistent, it becomes easier to estimate the required quantity of pipes for a project accurately. Contractors can confidently order the necessary materials without the risk of oversupply or shortage.

Moreover, standardized MS round pipe sizes enable easy replacements and repairs. If a section of a pipe needs to be replaced due to damage or wear, having standardized sizes ensures that a compatible replacement can be readily found and installed without extensive modifications to the existing system.

It’s worth noting that while standard sizes cover a wide range of applications, there may be specific cases where custom sizes are required. In such instances, it’s crucial to consult with experts and follow the appropriate guidelines to ensure the suitability and safety of the custom-sized pipes.

Lastly, standardized sizes contribute to the overall efficiency and safety of plumbing and infrastructure systems. By using pipes with appropriate diameters, pressure ratings, and flow capacities, the systems can operate optimally without undue strain or restrictions. This enhances the performance, longevity, and reliability of the entire system, minimizing the risk of failures or breakdowns.


Understanding and adhering to the standard MS round pipe sizes in MM is vital for professionals involved in construction, plumbing, and infrastructure projects. These standardized sizes ensure compatibility, efficiency, and safety, ultimately contributing to the success and longevity of the projects. By following the guidelines and consulting with experts, you can confidently select the appropriate MS round pipe sizes for your specific applications.


1. What are the advantages of using MS round pipes?

MS round pipes offer several advantages, including high strength, durability, and resistance to corrosion. They are also cost-effective, making them a popular choice for various construction and plumbing applications.

2. Can MS round pipes be used for both indoor and outdoor applications?

Yes, MS round pipes are versatile and can be used for both indoor and outdoor applications. However, it is important to consider factors like exposure to moisture and environmental conditions when selecting the right coating or protection for outdoor usage.

3. Are the standard MS round pipe sizes the same worldwide?

No, the standard MS round pipe sizes can vary from country to country. It’s crucial to follow the specific standards and codes applicable to your region to ensure compatibility and compliance with local regulations.

4. What are the common wall thicknesses available for MS round pipes?

The wall thicknesses of MS round pipes can vary depending on the size and application. Common wall thicknesses include Schedule 40 and Schedule 80, with Schedule 40 being thinner and suitable for lower pressure applications, while Schedule 80 is thicker and used in high-pressure scenarios.

5. Can MS round pipes be used for structural applications?

MS round pipes are commonly used for structural applications, such as building frameworks, scaffolding, and support structures. Their strength and durability make them an excellent choice for such purposes.

6. How do I select the right MS round pipe size for my project?

Selecting the right MS round pipe size depends on several factors, including the intended application, fluid flow requirements, and pressure considerations. Consulting with a professional or referring to the relevant standards and codes for your region is highly recommended to ensure accurate selection.

Back to top button

AdBlock Detected

AdBlock Detected: Please Allow Us To Show Ads